Gerry Harding is Jurassic Park's chief veterinarian, and is quite knowledgeable about the park's various dinosaurs. He's being visited by his teenage daughter Jess when the Isla Nublar incident occurs, and is quickly thrust into a fight for survival.
Doting Parent: Double Subverted; at first it seems he's showing Jess the park so that they can spend some family time together, but it turns out during the third episode that Jess was sent to him after a shoplifting incident, mostly to set her straight. He turns this around near the end by deciding to move back to Dallas, so that he can spend more time with his daughter.
The Everyman: Has shades of this, as he's the closest to being an ordinary civilian out of the cast.
Kindly Vet: He gets on very well with the Triceratops and the Parasaurolophus, to the point that he can safely treat the wound of one of them without sedating them first. Keep in mind that these animals must weigh a few tons, and could easily injure him if panicked. He's also generally a Nice Guy.
Overprotective Dad: Over the course of the game, he tries to keep Jess safe and steer her away from less commendable activities like stealing and smoking.
Papa Wolf: He will do anything to keep Jess safe, including facing down a T. rex with nothing but a single-shot tranq rifle.
The Smart Guy: As an employee of the park, he knows a lot about the machinery and facilities used on site, and being a veterinarian means he also knows about the dinosaurs and their behaviour pattern. He's also involved in solving most of the puzzles, and he's usually the voice of reason when things start going pear-shaped.
Surgeons Can Do Autopsies If They Want: Although only a vet, much of episode one involves him having to treat a fellow human, Nima, when he discovers her bite wound. It is justified under the circumstances since he was taught basic first aid, had radio guidance from someone who knew the relevant toxicology, and was really the only one able to treat Nima in any case.
Team Dad: More often than not, he'll be the one to defuse tension within the group.
Trust Me, I'm a Doctor: He needs to ensure Nima that he's a doctor before she'll let him treat her bite wound.
Workaholic: He eventually admits that this is responsible for both of his failed marriages. By the end, after the whole ordeal and nearly losing Jess, he decides to go back to being a simple vet to be closer to his daughter.
Jess is Gerry Harding's 14 year old daughter. Bitter and rebellious after her parents' divorce, she landed into some trouble for shoplifting, and was sent by her mother to stay with Gerry in hopes of him getting through to her. Upon her arrival in Jurassic Park, Jess was amazed by the dinosaurs, but also disappointed that her stay would be so short. However, she ends up getting way more than she bargained for when the incident occurs. Despite her often rebellious nature, Jess is kind-hearted and always willing to help out, and proves to be surprisingly essential member of the group.
Good Smoking, Evil Smoking: Of the good (if somewhat rebellious) variety - she secretly smokes, and even has a favorite brand. Needless to say, Gerry isn't too pleased when he finds out, probably in no small part due to one of her secret smoke breaks leading a pack of Raptors right to them.
Kleptomaniac Hero: The whole reason she's with Gerry on the island in the first place is because she was caught stealing a T-shirt at the mall, and her mother thought he could knock some sense into her. She later steals Dr. Sorkin's cigarettes, as well as the embryo canister from Billy, derailing his plans.
Nima is a mercenary hired by Biosyn to recover the embryos that Dennis Nedry stole from InGen. Unfortunately, things don't go quite as planned, and Nima becomes trapped on the island. However, she has a stronger connection with both Isla Nublar and InGen - as well as a deeper motivation to recover the embryos - than she first appears to.
Action Girl: She shows tracking and hunting skills in the first episode, can handle a machete well, and often fights off dinosaurs such as the Herrerasaurus.
Berserk Button: When she sees that Gerry is an employee at Jurassic Park, and therefore of InGen, she loudly calls him "Bastardo!" despite not even knowing him.
Broken Bird: See Dark and Troubled Past. She's willing to hold the Hardings at gunpoint during episode two, and is often the Spanner in the Works for the rescue team. She also has a chip on her shoulder regarding InGen. Her astonishment at the changes seen on the island becomes more poignant when more of her backstory is revealed, though.
Dark Action Girl: At the beginning, she's rarely friendly to other characters and has no scruples in holding two survivors hostage to protect her cover.
Dark and Troubled Past: Isla Nublar is the ancestral home of her tribe, but they were all forcibly evicted by InGen mercenaries after the company leased the island from Costa Rica.
Double Agent: Poses as an employee of InGen along with Miles in order to access Jurassic Park. Most of her Spanner in the Works moments are caused because she cannot afford to be found out by InGen, in case her cover is blown.
Expy: In appearance and manner, she's a lot like Vasquez from Aliens.
Foil: To Miles Chadwick. While she's calm and experienced, and does most of the work, Miles is inexperienced and lazy, and tends to go to pieces at the slightest hiccup. She also becomes a foil to Yoder later, starting in episode two; while she accuses the rescue team of being cold-blooded killers who joke about death, Yoder pokes fun at her by playing up to the stereotype.
Gratuitous Spanish: A significant portion of her dialogue. It makes it necessary at one point for the Hardings to speak to her in her native tongue, as she needs rest.
Machete Mayhem: She brings a machete to the island and uses it to hack through some thick foliage.
Name's the Same: She shares her name with a character from the first book: the doctor who treats a victim of the feral Procompsognathus, and who calls in Dr Guitierrez to identify the lizard. They don't have anything else in common, though.
Dr. Sorkin is one of InGen's leading paleogeneticists. Being a former animal rights activist, she feels a deep connection with the park's dinosaurs, and is strongly opposed to their exploitation. As a result of this, she was removed from InGen's geneticist team and replaced with Dr. Henry Wu, who cut many corners in the dinosaur cloning process - much to her disgust.
Animal Wrongs Group: Sees the dinos as animals that should be allowed to live out their "natural" lives. Also sees nothing wrong with releasing the Mosasaur into the ocean despite Gerry noting that it's an alpha predator.
Told no one about the Troodon even when she had to have known they were running around, psoing a massive danger to people and other dinos alike.
Break the Haughty: After finding out that she knew about the Troodon from the start, and is in fact responsible for them still existing in the first place, Yoder pulls a knife on her with deadly intent, but the others get him to let her live and settles for forcing her to admit that it's all her fault. She does, though it still seems she has to decide if her pride is worth more than her life. The events in the marine exhibit show that she still hasn't learned her lesson, but this time the consequences are far more tragic.
Broken Pedestal: Gerry has a lot of respect for Sorkin, at least at first. However, he becomes less and less sympathetic when he realizes what she's willing to do for her cause.
Death by Irony: Just moments after releasing the Mosasaur, it knocks her into the water and eats her.
The Ditherer: She repeatedly insists on not jumping to conclusions, which is potentially commendable in most circumstances, but it becomes her only real defence when Yoder accuses her of knowing the Troodons were escaping from the quarantine pens.
I Did What I Had to Do: Whenever someone calls her out on her actions, she stresses the morality of her decisions.
Karmic Death: Yoder certainly thinks so. Gerry, however, is less impressed by his attitude.
The Millstone: Had she not held up the team with her little science project in episode two, every playable character would have made it off the island alive. She is also responsible, however indirectly, for the deaths of D-caf, Oscar, and herself.
Never My Fault: Zig-zags. During episode three, she accepts that Gerry will have to report her to their superiors once they get off the island, but later on, she will make every excuse in the world to avoid responsibility or regret for anyone dying. She certainly prioritizes dinosaur lives over human lives and will keep making excuses to the grave that it was fine.
Omnidisciplinary Scientist: To a downplayed degree. Her specialization is in genetics, but she's capable of hacking Nedry's computer lockdown, knows enough toxicology to save Nima, and generally seems to have learned a fair bit of biology outside her field of genetics.
Reassigned to Antarctica: She was removed from InGen's geneticists team and relocated to an isolated field lab where she would be less trouble. Furthermore, InGen planned on reassigning her to Site B's research and development team, away from the park entirely.
The Rival: To Dr Wu. She wanted a slower but safer means of filling the gaps in dinosaur DNA sequences, but Wu came up with the faster alternative that got him the promotion she wanted.
Verbal Tic: Whenever discussing the genetics practiced by her superiors - specifically, those bits of it she disapproves of - she'll add a contemptuous "Henry Wu" for good measure.
Voice with an Internet Connection: During the first episode, she doesn't physically appear, so she helps Gerry, Jess, and Nima remotely using the computer in her office and a radio.
Well-Intentioned Extremist: While her concern over the dinosaurs' well-being is understandable, and while she doesn't harbour any ill-will towards the other survivors, undermining the lysine contingency removes a viable safety mechanism from InGen's hands, and her pro-dinosaur attitude causes a lot of trouble. She certainly sees herself as one, but jumps off the deep end when she learns that there's a bombing run heading toward the island, holding the other survivors hostage for her own ends.
Billy is one of the mercenaries hired by InGen to find anyone left on Isla Nublar and rescue them. Light-hearted and full of himself, Billy is almost constantly bragging or cracking jokes, but is still focused on rescuing the survivors. However, as the horrors of the island take their toll on him and his friends, Billy's character takes a much more sinister turn...
Captain Smooth and Sergeant Rough: Plays Captain Smooth to Oscar's Sergeant Rough. This trope isn't played fully straight, however, as the two are more or less equal in rank.
The Charmer: He's closer to this, persuading Sorkin not to stay by using his knowledge of her animal rights activism.
Chronic Backstabbing Disorder: First he decides to turn against his InGen employers by making a deal with Nima to sell the embryos, then turns on the other survivors after the rest of his fellow mercs are killed.
Dead Partner: Not Yoder himself, but his comrades' deaths have a strong effect on him.
Despair Event Horizon: After seeing his two comrades and best friends die horrible deaths, Billy is clearly broken by the situation. Along with a desire for vengeance against Dr. Sorkin, his own greed, and a large amount of stress, this is a contributing factor to his Face-Heel Turn.
Fake Ultimate Hero: He initially plays himself and the other mercs off as the cavalry riding in for the rescue, but the situation quickly deteriorates beyond his ability to deal with it. By game's end, he intends to let everyone else die to save himself and get rich in the process.
Greed: Threats and appeals to sympathy don't bother him, but suggest that he might get a decent retirement fund and he's all ears, as Nima discovers in episode three.
The Smart Guy: He actually shows a lot of clever thinking, as well as a good dose of people skills until he stops thinking straight. It only helps to show how badly he does snap.
Too Dumb to Live: Making a mad dash for the rolling embryo container with a T. rex - whose vision is based on movement - just a few feet away from you? What could possibly go wrong?
Tattooed Crook: He has a cross tattoo on his arm that isn't quite as awesome as Oscar's, but is still pretty nifty. And like Oscar, he doesn't really fit the "crook" part of the description. At first, anyway.
Oscar is one of the mercenaries hired by InGen to rescue any survivors stranded on Isla Nublar. A hulking giant of a man, Oscar is strong, serious and extremely capable in a crisis, but is far from humorless, and jokes around with his fellow mercs. However, he has ties to Jurassic Park's inception, as well as bad blood with Nima.
Big Guy Fatality Syndrome: He offers to go back and operate the doors, but that involves trying to sneak past three raptors. This results in his death, though he succeeds in opening the doors.
Captain Smooth and Sergeant Rough: Plays Sergeant Rough to Yoder's Captain Smooth. This trope isn't played fully straight, however, as the two are more or less equal in rank.
Combat Pragmatist: He'd happily kill a Dilophosaurus while it's down, though Yoder stops him. He also sneaks up on one of the raptors, for obvious reasons.
Dark and Troubled Past: He was one of the mercenaries hired by InGen to drive Nima's tribe off of Isla Nublar, and killed a couple of them.
Defeating the Undefeatable: His crowning moment of awesome involves this. He achieves, with nothing but a knife, raw strength, and reflexes, what an experienced park warden failed to achieve with a shotgun.
Tattooed Crook: Minus the "crook" (more or less), he has a pretty impressive tattoo on his left arm, representing people he's killed (skulls) and comrades he's lost (tombstones). He also has "sueño" (Spanish for "dream") tattooed on his neck.
Daniel "D-Caf" Cafaro
Voiced by: Ari Rubin
"D-Caf" is one of the mercenaries sent by InGen to rescue the survivors left on Isla Nublar. Being the team's pilot, he spends most of his time in the pilot seat of their helicopter.
And I Must Scream: He's still technically alive after the Troodon turn him into their nest, but completely paralyzed save for his eyes.
Tattooed Crook: While the "crook" part again doesn't really apply from what we see of him, he has a tattoo on his arm that is just like Billy's. This is how Billy and the other survivors identify D-Caf after discovering him as a living nest.
Voiced by: Jared Emerson-Johnson
Miles is a cowardly, nebbish Biosyn employee tasked with retrieving the embryos stolen from InGen by Dennis Nedry. He's teamed up with Nima Cruz, and proves to be a constant thorn in her side—until he has a rather nasty encounter with a pack of Dilophosaurs.
Asshole Victim: It's hard to feel bad about his death after he threw Nima to the Dilos in order to save his own skin.
Bad Bad Acting: His attempts to distract the security guard via phone involve him pretending, not very convincingly, to be an internal employee requesting employment data.
Double Agent: Poses as an employee of InGen along with Nima in order to access Jurassic Park.
Jerkass: Pretty much every line that he utters is a complaint, an order, an insult, or a bad joke, almost all of which are directed at Nima.
Karmic Death: He tries to sacrifice Nima to save himself, but the Dilophosaurs decide to attack him first.
Sacrificial Lamb: He's the contact Nedry was communicating with in the film. He and Nima spend most of the opening of episode one working together (even if Nima does most of the work), and his role in Biosyn's corporate espionage is filled in a little. Then he suffers the same fate as Nedry, and is effectively forgotten about after that.
Too Dumb to Live: Nima can comment on how he doesn't seem cut out for field work. Turns out she's right, and his inexperience with the dinosaurs is what leads to his demise.